Wire-line drilling clamp



March 22 1927.

C. S. WRIGHT WIRE LINE DRILLING CLAMP Filed Dec. is. 1926 IN V EN TOR.

A TTORNEY Patented Mar. 2 2, 19,27 6 i "TUITEDTSTATES PArsnroFnc r.

cLYDns. WRIGHT, or TOLEDO, orrro, assreivon ro'THE nArIoNaL snrrLYCOMPANY,

or renew, onro, A CORPORATION or OHIO; I

wrnnuivn maiLLme oLAMr.

Application filed December 18,1926... strata. 155,565.

7 My invention relates to wire line drilling clamps, and its object isto provide. a: novel compound leverage for closing the clamping jawswhereby the grip ot'the jaws on the wire line will be greatly increasedover what it would be with the use of simple levers.

Referring to the accompanying drawing,

Fig. 1 is a plan view of a clamp embodying my'invention, the jaws beingopen; Fig." 2, a

plan; view of the same with the jaws closed;

and Fig. 3, a fragmentary view partly in section, showmg the applicationof the compound leverage. 1

On the drawing 1 and 2 are two clamping '1 aws having the recesses 3 and4 to recelve a wlre llne to be clamped between the aws The jaws fulcrumonthe knife edgest and 6. carried by the blocks 7 and 8, held inplace bya bolt 9 extending through the projections 10 and 11 on the outer endsof the jaws.

The device so far described is claimedin Patent No. 1,601,197 grantedSeptember 28, 1926, on an application made by me, and forms no part ofthe present invention,

On the top of the jaws are the wire line guides 12 and 13 which overlapthe space between the jaws and prevent the wire line from being drawninto the same. This feature is claimed in my application Serial No.143,146 filed October 26, 1926, and forms no part of the presentinvention.

The jaws are provided with operating levers or arms 14 and 15' integralwith the jaws, the lever 14 being somewhat longer than the lever 15. Theinner face of the lever 14 has the lug 16 projecting toward the.

lever 15 and adapted to enter a recess 17 in the inner face of the lever15. In a fork in. the free end of the lever 15 is a lever 18 pivoted onthe pin 19 passed through the members of the fork.

ranged and proportioned that the inner end of the lever 18 may, when thejaws are closed, enter the hole 20 in the lug 16 and be turnedapproximately parallelwith the lever 15 when the jaws are closed. Thelever 14 has on its inner face a curved groove or recess 21 having itsinner portion opposite.

The parts are so arouter edge engages the stop 22 in the forked end ofthe lever 15. WVhen the lever 18 isin engagement with'the stop 22 andthe levers 14 and 15 are swung toclosing position, the leadlng :end 23of thelever 18 enters the groove 21 and is automaticallyguided therebyto a position approximatelyparallel with the lever 15, as shown on Figs.2 and 3, the 3 end 23 of the lever 18 being curved to correspond to thecurve'of the groove 21.

.l Vhen the jaws are nearly closed the link 24 which is swingingly heldon the outer end of the lever 18 by the pin 25 is slipped over the endofthe lever 14 and the screw 26 which works in the end of the link andagainst the outer edge of the lever 18 is turned by the handle 27 so asto draw the lever 14 and the outer end of the lever 18 toward eachother.

j The lug 16 is the fulcrum of the lever 18; power is applied by thescrew to theouter end of the lever 18; and power is applied to the lever15 at the pivot 19' which is approximately half way between the lug 16and the screw 26. This multiplies the closing power of the jaws by twoas compared with the power which would be applied by simple leversclosed by the screw, as in the instance shown in my said patent andapplication. 1 I claim 7 1 1. In. a clamp, a pair of pivotally connectedjaws, operating arms connected there-.

to, a lever pivoted to one arm and fulcrumed on the other arm, and powermeans pivoted to the latter arm and arranged to be applied to the leverto move the jaws toward each other.

2.-In a clamp, a pair of pivotally connected jaws, operating armsconnected thereto, a lever pivoted to one arm and fulcrumed on the otherarm, means pivoted to the lever and attachable to the latter arm, and apower device operable between the said lever and the said means forforcing the jaws toward each other. 1

3. In a clamp, a pair of pivotally connected jaws, operating armsconnectedthereto, a lever pivoted between its ends to one arm and havingone end tulc'rumed on the other arm, and power means connected 'to .thelatter arm and arranged to be applied to the remaining end of the leverto move the jaws toward each other.

4. In a clamp, a pair of pivotally connected aws, operating armsconnected therethe shorter arm, a'fnlcrum on the longer arm for theinner end. of the lever, and power means connected to the free end ofthe longer arm and'arranged to be applied to the outer end of the leverto move the jaws toward each other.

6. In a clamp, 21 pair of pivotally connected jaws, operating armsconnected there to, a lever permanently pivoted between its ends to onearm, means connecting both ends of the lever to the other arm, and apower device acting on one end of the lever to move the jaws toward eachother.

7. In a clamp, a pair of 'pivotally connected aws, operating armsconnected thereto, a. lever pivoted between its ends to one arm, meansconnecting both ends of the lever to the other arm, and a power devicecarried by the lever and acting on one end of thelever to move the jawstoward each other. 8. In a clamp, a pair of pivotally connected jaws, anoperating arm for each jaw, a lug carried by one arm and having a holetherein, a lever carried by the other arm and adapted to enter the holewhen the jaws are being'closed, and means for applying power to thelever for closing the jaws tightly.

9. In a clamp, a pair of pivotally connected jaws, an operating arm foreach jaw, a lug carried by one arm and having a hole therein, a levercarried by the other arm and adapted to enter the hole when the jaws arebeing closed, and means for applying power to the lever for closing theaws tightly, the first arm having a groove to receive the lever andguide it automatically into the hole.

10. In a clamp, a pair of pivotallyconnected jaws, an operating arm foreach jaw, a-lug carried by one arm and having a hole therein, a levercarried by the other arm and adapted to enter the hole, and means forapplying power to the lever for closing the jaws tightly, the first armhaving a groove to receive the lever and guide it automatically into thehole and the first arm having a stop for holding the lever in such aposition as to cause it to enter the groove automatically when the jawsare being closed.

In testimony whereof, I hereunto aftlx my signature.

' CLYDE S. I/VRIGHT.

